C Probleme Lab7

//1.

#include <stdio.h>
#include <conio.h>
#include <string.h>

FILE* citire( char f[50] )
{
    FILE* fin=fopen(f, "rt");
    if(!fin)
    {
        printf("Eroare la deschidere.");
        return 0;
    }
    return fin;
}
float parcurgere ( FILE* fin, FILE* fout, int *lmed, int *i )
{
    char f[50]="", c;
    int ok=1,nrcop=0;
    *i=0;
    while(!feof(fin))
    {
        c=fgetc(fin);
        if(c!=EOF)
            f[strlen(f)]=c;
        if((c<'a' || c>'z') && c!=' ' && c!='\n')
            ok=0;
        else if(c=='\n')
        {
            if(feof(fin))
                break;
            if(f[0]=='\n')
                ok=0,(*i)--;
            int l=strlen(f);
            if(ok)
                fprintf(fout, "%s", f), nrcop++;
            *lmed+=strlen(f)-1;
            int q;
            for(q=0;q<l;q++)
                f[q]=0;
            ok=1;
            (*i)++;
        }
    }
    return (float)nrcop/ *i;
}
int main ()
{
    FILE *fin, *fout;
    char f[50];
    int lmed=0,i=0;
    float lcop;

    scanf("%s", f);
    fin=citire(f);
    if(!fin)
        return 1,getch();
    fout=fopen("f.out", "wt");
    lcop=parcurgere(fin, fout, &lmed, &i)*100;

    printf("Procent linii copiate:%.2f \tLungime medie:%.2f",lcop, (float)lmed/i);
    getch();
}


//2.
#include <stdio.h>
#include <conio.h>
int parcurgere( FILE *fin, FILE *fout1, FILE *fout2, int *s, int a, int b)
{
    int x,nr=0;
    while(!feof(fin))
    {
        if(!fscanf(fin, "%i", &x))
        {
            printf("Eroare la citire din fisier");
            getch();
            return -1;
        }
        if(x>=a && x<=b)
            fprintf(fout1, "%i ", x),*s+=x,nr++;
        else
            fprintf(fout2, "%i ", x);
    }
    return nr;
}
int main ()
{
    FILE *fin, *fout1, *fout2;
    fin=fopen("pr2.in", "rt");
    if(!fin)
    {
        printf("Eroare la citire");
        getch();
        return 1;
    }
    fout1=fopen("pr2a.out", "wt");
    fout2=fopen("pr2b.out", "wt");
    int a,b,x,s=0;
    printf("Citeste a, b: ");
    scanf("%i %i", &a, &b);
    x=parcurgere(fin, fout1, fout2, &s, a, b);

    printf("%i %.2f", x, (float)s/x);

    getch();
}
}